Buffalo- Police say the drugs he was pushing were so powerful that they could kill a person instantly.
20-year-old Angel Marcial is acing several charges tonight including drug possession and intent to sell.
Investigators say Marcial was selling a lethal combination of heroin and 100-percent pure fentanyl.
He was arrested at a Niagara Street gas station after running from police at his Arthur Street home.
Police also confiscated more drugs, $4600in cash and a loaded 45 caliber semi automatic handgun at Marcial's residence.